Glass-tube water-gage for steam-boilers.



No, 718,046. PATENTED JAN. 6, 1903.

W. BRIGHT. A

GLASS-TUBE WATER GAGE FOR STEAM BOILERS.

APPLICATION FILED MAY 22, 1902.

H0 MODEL.

hue/afar,

UNITED STATES,

PATENT OFFICE.

WILLIAM BRIGHT, OF KIMBERLY, UTAH.

GLASS-TUBE WATER-GAGE FOR STEAM-BOILERS.

SPECIFICATION forming part of Letters Patent N 0. 718,046, dated January 6, 1903. Application filed May 22,1902. Serial No. 108,590- (No model.)

To all 1,071,011? it potty concern:

Beit known that I, WILLIAM BRIGHT,a citizen of the United States,residing at Kimberly, county of Pinto, and State of Utah, have invented certain new and useful Improvements in Glass-Tube Water-Gages for Steam-Boilers, of which the following is a specification.

My invention relates to glass-tube watergages for steam-boilers.

The object of the present invention is the provision of an improved and novel automatically-acting valve for use in connection with glass-tube water-gages which will normally remain open and not interfere with the rise and fall of the water in the glass tube of the gage, but which will automatically close by the pressure of the steam upon the breaking of the glass tube, thereby shutting ofi the steam-pressure and preventing scalding or injuryto any person near the water-gage and also permitting the steam to be shut ed at leisure in the regular way by closing the ordinary globe-valve used on water-gages.

The invention consists of certain improved features and novel combinations of parts set forth in detail hereinafter and recited in the appended claim. I

In the accompanying drawings, Figure 1 is a view of a glass-tube water-gage to which my invention is applicable, and Fig. 2 an enlarged section illustrating the invention.

The numeral 1 designates the glass tube of the water-gage, While 2 and 3 are fittings at the ends of the tube 1, which are provided with globe-valves 4, by which the steam or water can be shut off from the glass tube 1 in a well-known manner.

In Fig. 2 I have shown my invention as used in connection with the lower fitting 3; but it can be used as well with the upper fitting 2.

The fitting 3 consists of a shell 5, interiorly recessed at 6, while the lower portion of the fitting is made into the larger shell 7, into which screws the plug or head 8, provided with the petcock 9.

i The numeral 10 designates a three-leaf check-valve, whose head 11 is provided with an annular groove 12 on its upper face, and the head 11 is adapted to close on the seat 13.

The head 11 is located in the shell 7 and provided with a stem 14, having a notched lower end 15, adapted to straddle the passage through the petcock casing 9 and to rest against the said casing, and it is of such length that it will allow the valve-head 11 to remain unseated in a suitable manner under ordinary circumstances. A coil-spring 16, which surrounds the leaves of the valve and is located in the counterbore or recess 6 and has its upper end seated against a shoulder 17 and its lower end seated in the groove 12, keeps the valve normally pressed down, with its stem bearing against the plug 8. The valve is thus normally kept open; but should the glass tube 1 break the steamwill immediately rush from the boiler through the fitting and act against the face of the valvehead 11, causing it to close immediately,and thus confining the steam in the fitting. The steam is thus effectually checked by the check-valve and again later out 01f by closing the globe-valve 4: when it is convenient to do so.

Having thus described myinvention, what I claim as new, and desire to secure by Letters Patent, is

In a device of the class described,the combination with a fitting for the glass tube,said fitting comprising a shell of different internal diameters and aseat whereby the portions of the shell join, and the smaller portion of the shell being internally recessed or counterbored, of a plug connected to the larger portion of the shell, a petcock connected to the plug,and a check-valve comprising leaves, a head having a groove and which is adapted to fit the seat, and a stem on the head which is provided with a bifurcated lower end, and a coil-spring located in the counterbore and surrounding the leaves of the valve and seated in the groove in the valve-head,said spring keeping the valve norm ally unseated and the stem being adapted to bear on the plug and limit the opening of the valve.

In testimony whereof I hereunto affix my signature in presence of two witnesses.

WILLIAM BRIGHT. 

